Justice League of America and The Silver Surfer

There aren't a lot of Marvel Heroes that could give the JLA a run for their money, but I think The Surfer has enough raw power to really do some damage.  This would especially be the case if he took them by surprise and they were not aware of his ability.  It's easy to underestimate a naked guy on a surfboard, after all. Anyway, it would be a fun battle up until the point where they realize it was all based on a crazy misunderstanding and decided to unite against the real villain.